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Retinol vs retinaldehyde vs prescription retinoid explained: the conversion ladder to retinoic acid, how strength maps to irritation, and which rung to start on.
Read guide →3 guides · facts & specs only
How to choose Retinol? LogicBuy compares Retinol by objective specs — understand the key parameters, skip the marketing hype, and pick what truly fits your needs.
Retinol vs retinaldehyde vs prescription retinoid explained: the conversion ladder to retinoic acid, how strength maps to irritation, and which rung to start on.
Read guide →All three are marketed as "anti-aging" but they work at completely different biological targets. Retinol has the strongest evidence base; niacinamide is the safest broad-spectrum option; peptides are a gentle alternative for those who cannot use retinol. Here is how to actually choose.
Read guide →Retinol has more clinical evidence for anti-aging than any other skincare ingredient, but it is also the most commonly misused. This guide covers concentrations, proper application methods, and ingredient combinations.